Floor structure.



M. P. MoGARIfHY. FLOOR STRUCTURE.

APPLIOATION FILED MAR.31, 1910.

Patented Dec. 24, 1912.

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mrrcnnu. r. mccna'rnr, or ma'w YORK, N. Y.

FLOOR STRUCTURE.

Specification of Letters Patent.

' Application filed March 31, 1910. Serial No. 552.710.

To all whom it may concern:

Be it known that I, Mrronaml MC- CARTHY, a resident of New York, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in Floor Structures, of which the following is afull, clear, and precise specification.

My invention relates to floor structures, particularly to floorstructures built up of units or members of cementitious material.

In fire proof buildings inetallic' beams, usually I beams, are strungbetween the main and intermediate supporting walls, and heretoforepreviously formed blocks of stone or cement have been laid over the topsof the beams, or, molds are formed about and between the beams intowhich concrete or cement is poured to form the floor structure. Theapplication of. the previously formed blocks ontop of the beams resultsin a floor structure which is very thick and 00- cupies too much space,while the molding process requires considerable labor and otherexpenditures.

The broad object of my invent-ion is, therefore, to provide for improvedconstruction and application of floor blocks and other previously formedmembers, which will result in thinner and cheaper floor structures.

More in detail, the salient objects of my invention are to provide skewbacks or ledge blocks which can be previously formed and then applied tothe I beams to encircle the webs and lower flange thereof and to providebearingsurfaces for the floor blocks which span between the I beams; toprovide an arrangement which will enable the skew backs to beconstructed to support the floor blocks in any desired position betweenthe beams ranging from positions in which the floor blocks are above thelevel of the I beams to positions in which the top surfaces of theblocks are practically flush with the tops of the I beams; to provideimproved reinforcing members in the floor blocks which at their ends mayhook over the outer upper flanges of the I beams spanned by the blocksthus to more securely strengthen the floor block and also maintainalinement of the I beams; to provide such construction of the skew backsand the floor blocks that after application. of the floor blocks theskewbackswill be held thereby firmly in position on thesupporting beams;to provide an improved construction which will enable finish layers ormaterial to be readily and quickly applied to the floor blocks to eitherthe top or lower faces thereof; and in general to provide a moresimplified and eflicient construction of parts and arrangement thereofto produce a firm and neat floor structure.

In the accompanying drawing which clearly illustrates my inventionFigure 1 is a perspective partly sectional view of one form of floorstructure, Fig. 2 is a similar view of another form of floor structure,and Fig. 3 is a view of still another form of floor structure, showingfinish ceiling material applied thereto.

The main supporting means, here shown as I.beams 1, in practice rest onand span between the main and intermediate walls of a building. To thesides of these beams I apply ledge blocks or skew backs 2 formed up ofcementitious material such as concrete or cement, these blocks or skewbacks fitting against the web and inner faces of the I beam flanges, andeach extending also half way across the base of the I beams, as shown,the bases of the blocks abutting so that the entire web and lower flangeof a beam is'inclosed by cementitious material.

These blocks'or skew backs are shaped to offer horizontal ledge surfaces3 for supporting floor blocks or units 4 which span between the beams.Each block 2 is provided with proper metal reinforcement '5 whichpreferably follows the outer contour of the block. In Fig. 1 the ledgesurfaces 3 are rather low to allow the floor block 4 to drop between thesupporting beams to bring 1ts top surface almost flush with the tops ofthe beams. The vertical faces, 6 of the skewbacks are preferably flushwith the outer edges of the upper. beam flange, and these surfacesareengaged by the end faces of the floor block. Each floor block isprovided with suitable transverse and longitudinal reinforcing bars 7and 8 respectively. As shownin Fig. 1, the ends of the longitudinal bars8 deflect upwardly and then to Patented Dec. 24, 1912.

the exterior of the block to form horizontal extensions 9 terminating indownwardly extending hook ends 10. The sections 9 engage with the topsof the I beams, and the hook ends 10 engage about the outer edge of theupper I beam flanges but preferably not 1n direct contact therewith. Thefloor block at its outer end edges is cut away to leave recesses 11 forreceiving the hook'ends 10 of adjacent floor blocks, as shown in thefigure. After the blocks are in place cement 12 is applied over the topsof the I beams and in the recesses 11 to fill the recesses and to coverup the extensions 9 and their hooked ends 10, the top surface of thecement 12 forming then a continuation of the top surfaces of theadjacent blocks. The extending ends of the reinforcing rods 8 and thetop of the beams are thus entirely incased by cement, the skew backs, asbefore explained, incasing the web and lower flange of the beams, theentire beam being thus incased and thoroughl protected against corrosion and other eflia cts. In Fig. 1 I have also shown nailing strips13 securely embedded in the top face of the floor block, the

under side of which block may have the peripheral flanges 14, whoselongitudinal sections act in the capacity of arches for strengtheningthe floor blocks and for enabling said blocks to be of considerablelength.

In Fig. 2'the ledge surfaces 3 are close to the top of the supportingbeams and receive the ends of the floor blocks 4. In this arrangementthe horizontal reinforcing bars 8 do not deflect upwardly, as shown inFig. 1, but extend straight outwardly to engage with the I beam in thesame manner as described with reference to Fig. 1. In the arrangement ofFig. 2the floor blocks are shorter than the distances between thevertical faces 6 of the skew backs in order to leave recesses 11 betweenthe ends of the floor blocks and the faces 6, these recesses and thespaces between the floor block ends above the I beams being filled inwith cement 12 flush with the top surfaces of the floor blocks.

In Fig. 3 the floor blocks have peripheral rims or flanges 15 whose endsections are provided at their outer faces with intermediate flanges 16whose lower faces engage with the ledge faces 3 of the skew backs, andwhose upper faces form the bases of the recesses 11 for receiving thehooked ends of the longitudinal reinforcing bars 8 passing through'thebody parts of the floor'blocks, these recesses and the spaces betweenthe adjacent ends of the floor blocks and above the I beams being filledin with cement in the same manner as in the arrangement of Figs. 1 and2. The rims 15 extend downwardly below the lower flanges of the I beamsfor receiving finish ceiling blocks'17. {is shown, each of these finishblocks has inner and outer flanges 18 and 19 at its edges formingbetween them a groove 20, the inner flanges being slightly shorter thanthe outer flanges so that when adjacent blocks meet there will be formeda locking channel 21 connecting with the exterior through the passageway22 between the shorter inner flanges. 1n the adjacent transverse rims ofthe floor blocks are formed grooves 23 which register to form a channelfor receiving the heads 24 of locking keys is, the webs 25 of these keyspassing through the channels 22 between the short flanges of the finishblocks, and the flanges 26 of the keys engaging in the channels 21between adjacent finish blocks, these keys thus serving to rigidlysupport the finish blocks from and against the rims of the floor blocks.The ceiling blocks can be-applied so that the keys It will engage theadjacent edges thereof to thus interlock the blocks. A layer 27 ofinsulating material is preferably'inserted between the ceiling blocksand the floor blocks, as shown. The inner flanges 18 of the ceilingblocks are preferably offset a distance so that insulating spaces 28 areformed between the ceiling blocks and insulating material. In some casesthe ceiling blocks are not necessary, particularly in the arrangementshown in Fig. 2, where the lower surnecessity of subsequent finishingoperations.

The various parts mutually hold each other firmly and securely in properposition, the floor blocks being provided with reinforcing members whichhook over the supporting beams so that ti ey arelocked rigidly inposition and the supporting beams held in alinement.

I do not desire to be limited to the exact forms, construction andarrangement which I have shown, as changes may readily be made whichwould still come within the scope of my invention, and I, therefore,desire to secure the following claim.

I claim- In a floor structure, the combination of supporting I-beams,skew back units applied to'the sides of the beams and formed ofcementitious material, floor blocks of cementitious material spanninbetween the skew back units of adjacent loeams and having downwardlyextending flanges terminating below said I-beams, ceiling units havinglugs or ridges for engaging the floor block flanges to space the ceilingunit bodies from provide air space between said sheets and said flanges,keys engaging on said flanges the bodies of the floor blocks. 10 andwith said ceiling unit lugs or ridges for In Witness hereof, I hereuntosubscribe my suspending said ceiling units, and sheets of name this 25thday of March, A. D. 1910.

insulat ng material interposed between said MITCHELL F. MCCARTHY.flanges and said ceiling unit lugs or ridges Witnesses: to therebyintroduce an air s ace between THOMAS E. COWART,

said sheets and the ceiling unit odies and to JESSE W. TOBEY.

